West Berkshire · England
Yattendon External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Yattendon and across West Berkshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints with sealant missing in places
- Failed seals between different materials
- Sealant pulling away from one side of the joint
Different surfaces, different methods
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
External mastic in Yattendon
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the line blends in. We work on façade panels, joints between brick and frames and copings & trims, and people most often call us about plants rooting in failed movement joints and movement joints with cracked, split or missing sealant.
In a village or hamlet like Yattendon, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Location
- Yattendon (RG18)
- Wider area
- West Berkshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Somewhere as small as Yattendon, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Related advice
Do you need external mastic in Yattendon?
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
People normally contact us after spotting something like this:
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
If you live in an older home near Church of St Peter and St Paul, an extension built onto an older house moves differently, and the joint between them takes the strain.
Comparing quotes
- What the cure time is
- Which sealant they’ll use, and why
- What insurance they hold
- How the colour is chosen
Walls and rooflines in Yattendon
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Basildon Park (about 4.2 miles north-east) are a reminder that the area around Yattendon has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near Goring & Streatley station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Yattendon C.E. Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Yattendon is about 5 miles north-east of Thatcham, in West Berkshire. We provide external mastic to householders, landlords and businesses in Yattendon and nearby. We cover 155 towns and villages across West Berkshire. Our Reading page covers work nearby, about 10 miles away.
We work across the RG18 postcode area for external mastic. If you need external mastic at a property on Yattendon Lane, Bryants Lane and Chapel Lane or a nearby road, our applicators can take on the job. We also cover the places around Yattendon: Frilsham (1 mile south-west), Hampstead Norreys (2 miles north-west), Wellhouse (2 miles south-west), Little Hungerford (3 miles west) and Oare (3 miles west). Further out, we also cover Newbury (7 miles south-west), Thatcham (5 miles south-west), Burghfield Common (8 miles south-east), Speenhamland (7 miles south-west), Hungerford (14 miles west) and Spencers Wood (11 miles south-east).
Local landmarks in Yattendon
Around Yattendon, our work takes us to homes and buildings near The Royal Oak pub and the streets around them. For rail, the closest station is Goring & Streatley station, roughly 4.9 miles north-east of the centre. Other landmarks nearby include Yattendon Castle (within half a mile north-west) and West Berkshire Community Hospital (5.7 miles south-west).
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Cracking across the wall rather than at a joint
- Render that is blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Copings & trims
Why it’s worth doing now in Yattendon
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last so it’s worth doing right. Where a wall is exposed, as many are in small places like Yattendon, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we will explain what it covers.
What you get with us
- Anti-fungal sanitary silicone in wet areas
- 180+ five-star Google reviews
- White, clear, grey or another colour, product permitting
- Colour picked to suit the job
Take a look at how sealant jobs are priced or our reviews.
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- The product the joint needs
- Whether there’s mould to deal with
- Access and height
- The size of the job
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
There’s no need for technical detail. Just tell us:
- A few photos by email, if you can
- Any access issues, like height or stairs
- Roughly how big the job is
- Where the job is, and your postcode
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Nearby places to Yattendon
Also in Yattendon
FAQs for Yattendon
Will you come out to Yattendon?
Yes. Yattendon is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do external mastic in Yattendon?
Yes, Yattendon is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Is it OK to seal over old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and reseal when it splits.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Do you guarantee your work?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Do you take out the old sealant first?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Act on the first splits you see
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Walk round the building once a year and look at the joints
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.